研究期間：10108~10207;We would employ in situ scanning tunneling microscope (STM) and atomic force microscope (AFM) to study the adsorption of aniline, pyrrole, and thiophene molecules and their subsequent electropolymerization on well-defined single crystal electrodes of gold, copper, platinum, etc. The main goals of this study include revealing the relationship between adsorption of molecules and their subsequent coupling to produce molecules on electrode surfaces. We will examine experimental parameters controlling the conformations of these organic conducting polymers, hoping to learn the way to control the size and shape of these polymers. The synergistic effect exerted by 3-mercaptosulfonic acid and chloride on the electrodeposition of Cu would be examined. These two species are known to cause higher rate of Cu deposition, although the mechanism behind this effect is not clear. We will use high resolution STM imaging techniques to examine the adsorption of MPS molecules with and without chloride to unravel if MPS and chloride anions are coadsorbed on electrode surface. While most research has employed copper electrode, we would use platinum electrodes to compare with others, because we are more familiar with the characteristics of platinum. The adsorption of organic molecules such as pentacene, thienothiophene and N-substitutednaphthalene 1,4,5,8-tetracarboxylicdiimide (NTCDI) on gold electrodes would be examined also. These molecules are known to have potential applications as semiconducting thin film. The structure or arrangement of molecules in the adlayer could be important in determining the charge mobility in films fabricated from these organic molecules. We intend to obtain molecular resolution STM images to address how these molecules would be adsorbed on solid support and what interactions are involved in organizing molecules in this thin film.
